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Math Help - Solution in ordered pairs for the following

  1. #1
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    Red face Solution in ordered pairs for the following

    8x + 7y = -50
    =3x + y = 26

    What is the ordered pair for these?

    Please show the work so I can understand how you achieved it.
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  2. #2
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    Any efforts to solve it?


    Hint: multiply the second equation by -7 and sum (1) and (2) equation.

    Write here what you got.
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  3. #3
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    I tried that and this is what I got....

    8x + 7y = -50
    -3x + y = 26

    8x + 7y = -50
    21x -7y = -182
    29x = 232
    Divide both by 29

    X = 8

    I then plug in 8 into one of the equations to solve for y

    -3(8) + Y =26
    -24 + Y = 26
    Y = 26 + 24
    Y = 50

    8(8) + 7 (50) = -50
    64 + 350 = -50 (false)

    and this is where I am having a hard time. What am I doing wrong?
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  4. #4
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    Quote Originally Posted by OneidaFL View Post
    I tried that and this is what I got....

    8x + 7y = -50
    -3x + y = 26

    8x + 7y = -50
    21x -7y = -182
    29x = 232 ... -50 + -182 = -232


    What am I doing wrong?
    ...
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  5. #5
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    x=-8.

    Double check your work.
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  6. #6
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    Well so much for work smart, not hard.. I forgot the negative on 232. Now I was able to work it out. You are the greatest. I did not just get the answer by myself, you helped me to accomplish that.! Thanks
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